Fault codes / SeeLevel tank monitor

SeeLevel II and Lippert MyRV tank monitor fault codes

Sender panels are self-adhesive circuit boards stuck to the OUTSIDE of the tank. They read the level through the tank wall and auto-calibrate to the length they are cut. Each sender talks to the display over a 2-wire cable with error-checked data, so the display can tell you what is wrong.

SeeLevel tank monitor code OPn

Open. Sender unresponsive or open wiring. On LPG: open wiring or bad resistance sender.

SeeLevel tank monitor code Sht

Short. Shorted sender or wiring. (LPG short reads zero all the time.)

SeeLevel tank monitor code Err

Data error. Bad data, damaged wiring or electrical interference.

SeeLevel tank monitor: ntP / nbo

Stacked senders. ntP = no top sender received. nbo = no bottom sender received. Both missing = OPn.

SeeLevel tank monitor: bot / toP / sin

Single sender setup. Shows how the single sender is programmed. Informational.

Learn the system

• Fresh water and the pump
• Plumbing leaks and fittings
• Winterizing and de-winterizing
• Tank sensors

Practice it on a service call

• Water pump quit
• Water pump kicks on by itself
• Toilet won't hold water

Guided diagnosis

• Water Pump
• Toilet

Full field guide: SeeLevel II and Lippert MyRV tank monitor

Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.